+Open data
-Basic information
Entry | Database: EMDB / ID: EMD-7070 | |||||||||
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Title | Structure of the tail of the marine siphovirus TW1 | |||||||||
Map data | Whole Tail of TW1 | |||||||||
Sample |
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Biological species | Pseudoalteromonas phage TW1 (virus) | |||||||||
Method | single particle reconstruction / cryo EM / Resolution: 23.5 Å | |||||||||
Authors | Wang Z / Rossmann MG | |||||||||
Funding support | United States, 1 items
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Citation | Journal: Structure / Year: 2018 Title: Structure of the Marine Siphovirus TW1: Evolution of Capsid-Stabilizing Proteins and Tail Spikes. Authors: Zhiqing Wang / Stephen C Hardies / Andrei Fokine / Thomas Klose / Wen Jiang / Byung Cheol Cho / Michael G Rossmann / Abstract: Marine bacteriophage TW1 belongs to the Siphoviridae family and infects Pseudoalteromonas phenolica. Mass spectrometry analysis has identified 16 different proteins in the TW1 virion. Functions of ...Marine bacteriophage TW1 belongs to the Siphoviridae family and infects Pseudoalteromonas phenolica. Mass spectrometry analysis has identified 16 different proteins in the TW1 virion. Functions of most of these proteins have been predicted by bioinformatic methods. A 3.6 Å resolution cryoelectron microscopy map of the icosahedrally averaged TW1 head showed the atomic structures of the major capsid protein, gp57, and the capsid-stabilizing protein, gp56. The gp57 structure is similar to that of the phage HK97 capsid protein. The gp56 protein has two domains, each having folds similar to that of the N-terminal part of phage λ gpD, indicating a common ancestry. The first gp56 domain clamps adjacent capsomers together, whereas the second domain is required for trimerization. A 6-fold-averaged reconstruction of the distal part of the tail showed that TW1 has six tail spikes, which are unusual for siphophages but are similar to the podophages P22 and Sf6, suggesting a common evolutionary origin of these spikes. | |||||||||
History |
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-Structure visualization
Movie |
Movie viewer |
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Structure viewer | EM map: SurfViewMolmilJmol/JSmol |
Supplemental images |
-Downloads & links
-EMDB archive
Map data | emd_7070.map.gz | 114.7 MB | EMDB map data format | |
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Header (meta data) | emd-7070-v30.xml emd-7070.xml | 11.9 KB 11.9 KB | Display Display | EMDB header |
Images | emd_7070.png | 28.6 KB | ||
Archive directory | http://ftp.pdbj.org/pub/emdb/structures/EMD-7070 ftp://ftp.pdbj.org/pub/emdb/structures/EMD-7070 | HTTPS FTP |
-Related structure data
-Links
EMDB pages | EMDB (EBI/PDBe) / EMDataResource |
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-Map
File | Download / File: emd_7070.map.gz / Format: CCP4 / Size: 125 MB / Type: IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES) | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Annotation | Whole Tail of TW1 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Voxel size | X=Y=Z: 4.9 Å | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Density |
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Symmetry | Space group: 1 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Details | EMDB XML:
CCP4 map header:
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-Supplemental data
-Sample components
-Entire : Pseudoalteromonas phage TW1
Entire | Name: Pseudoalteromonas phage TW1 (virus) |
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Components |
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-Supramolecule #1: Pseudoalteromonas phage TW1
Supramolecule | Name: Pseudoalteromonas phage TW1 / type: virus / ID: 1 / Parent: 0 / Macromolecule list: #1 / NCBI-ID: 1366055 / Sci species name: Pseudoalteromonas phage TW1 / Virus type: VIRION / Virus isolate: STRAIN / Virus enveloped: No / Virus empty: No |
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Virus shell | Shell ID: 1 / Diameter: 620.0 Å / T number (triangulation number): 7 |
-Experimental details
-Structure determination
Method | cryo EM |
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Processing | single particle reconstruction |
Aggregation state | particle |
-Sample preparation
Buffer | pH: 7.5 Component:
Details: 50 mM Tris, pH 7.5, 100 mM NaCl, 8 mM MgSO4 | ||||||||||||
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Grid | Model: Quantifoil R2/1 / Mesh: 200 / Support film - topology: CONTINUOUS / Pretreatment - Type: GLOW DISCHARGE | ||||||||||||
Vitrification | Cryogen name: ETHANE / Chamber humidity: 75 % / Chamber temperature: 298 K / Instrument: GATAN CRYOPLUNGE 3 |
-Electron microscopy
Microscope | FEI TITAN KRIOS |
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Electron beam | Acceleration voltage: 300 kV / Electron source: FIELD EMISSION GUN |
Electron optics | Illumination mode: FLOOD BEAM / Imaging mode: BRIGHT FIELDBright-field microscopy / Cs: 2.7 mm / Nominal defocus max: 6.0 µm / Nominal defocus min: 2.0 µm / Nominal magnification: 37000 |
Sample stage | Specimen holder model: FEI TITAN KRIOS AUTOGRID HOLDER / Cooling holder cryogen: NITROGEN |
Temperature | Min: 80.0 K / Max: 80.0 K |
Image recording | Film or detector model: OTHER / Detector mode: COUNTING / Average electron dose: 25.0 e/Å2 |
Experimental equipment | Model: Titan Krios / Image courtesy: FEI Company |
-Image processing
Particle selection | Number selected: 2496 |
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CTF correction | Software - Name: jspr (ver. ctfit2) |
Initial angle assignment | Type: PROJECTION MATCHING / Software - Name: jspr |
Final angle assignment | Type: PROJECTION MATCHING / Software - Name: jspr |
Final reconstruction | Applied symmetry - Point group: C6 (6 fold cyclic) / Resolution.type: BY AUTHOR / Resolution: 23.5 Å / Resolution method: FSC 0.143 CUT-OFF / Software - Name: jspr / Number images used: 2493 |